Bulletin of the American Physical Society
54th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 68, Number 7
Monday–Friday, June 5–9, 2023; Spokane, Washington
Session V01: Poster Session III (4:00pm-6:00pm, PT)
4:00 PM,
Thursday, June 8, 2023
Room: Exhibit Hall C
Abstract: V01.00143 : Cavity-enhanced transient absorption spectroscopy of 2-thiouracil*
Presenter:
Rudolf Popper
(Stony Brook University (SUNY))
Authors:
Rudolf Popper
(Stony Brook University (SUNY))
Myles C Silfies
(Stony Brook University (SUNY))
Susanne Ullrich
(University of Georgia)
Thomas K Allison
(Stony Brook University (SUNY))
We present new visible transient absorption spectra of gas-phase, jet-cooled 2-thiouracil after S2 excitation obtained with a unique cavity-enhanced femtosecond transient absorption spectrometer [2]. We compare our results to TRPES data and ab initio theory that directly calculates our observables. Our results elucidate the contribution of the probe process to the observed dynamics, separating the underlying molecular dynamics from artifacts of the measurement method.
[1] J.A. Sánchez-Rodríguez et al., Phys. Chem. Chem. Phys. 19, 19756 (2017).
[2] M.C. Silfies et al., Phys. Chem. Chem. Phys. 23, 9743 (2021).
*This work was supported by the U.S. National Science Foundation (award number 2102319) and the American Chemical Society Petroleum Research Fund (award number 62125-ND6).
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